src/vikmapniklayer.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (c) 2015, Rob Norris <rw_norris@hotmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "viking.h"
  27 #include "vikutils.h"
  28 #include <glib.h>
  29 #include <glib/gstdio.h>
  30 #include <glib/gi18n.h>
  31 #include <string.h>
  32 #include <math.h>
  33 #include <stdlib.h>
  34 #include <ctype.h>
  35
  36 #include "map_ids.h"
  37 #include "maputils.h"
  38 #include "mapcoord.h"
  39 #include "mapcache.h"
  40 #include "dir.h"
  41 #include "util.h"
  42 #include "ui_util.h"
  43 #include "preferences.h"
  44 #include "icons/icons.h"
  45 #include "mapnik_interface.h"
  46 #include "background.h"
  47
  48 #include "vikmapslayer.h"
  49
  50 struct _VikMapnikLayerClass
  51 {
  52         VikLayerClass object_class;
  53 };
  54
  55 static VikLayerParamData file_default ( void )
  56 {
  57         VikLayerParamData data;
  58         data.s = "";
  59         return data;
  60 }
  61
  62 static VikLayerParamData size_default ( void ) { return VIK_LPD_UINT ( 256 ); }
  63 static VikLayerParamData alpha_default ( void ) { return VIK_LPD_UINT ( 255 ); }
  64
  65 static VikLayerParamData cache_dir_default ( void )
  66 {
  67         VikLayerParamData data;
  68         data.s = g_strconcat ( maps_layer_default_dir(), "MapnikRendering", NULL );
  69         return data;
  70 }
  71
  72 static VikLayerParamScale scales[] = {
  73         { 0, 255, 5, 0 }, // Alpha
  74         { 64, 1024, 8, 0 }, // Tile size
  75         { 0, 1024, 12, 0 }, // Rerender timeout hours
  76 };
  77
  78 VikLayerParam mapnik_layer_params[] = {
  79   { VIK_LAYER_MAPNIK, "config-file-mml", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("CSS (MML) Config File:"), VIK_LAYER_WIDGET_FILEENTRY, GINT_TO_POINTER(VF_FILTER_CARTO), NULL,
  80     N_("CartoCSS configuration file"), file_default, NULL, NULL },
  81   { VIK_LAYER_MAPNIK, "config-file-xml", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("XML Config File:"), VIK_LAYER_WIDGET_FILEENTRY, GINT_TO_POINTER(VF_FILTER_XML), NULL,
  82     N_("Mapnik XML configuration file"), file_default, NULL, NULL },
  83   { VIK_LAYER_MAPNIK, "alpha", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Alpha:"), VIK_LAYER_WIDGET_HSCALE, &scales[0], NULL,
  84     NULL, alpha_default, NULL, NULL },
  85   { VIK_LAYER_MAPNIK, "use-file-cache", VIK_LAYER_PARAM_BOOLEAN, VIK_LAYER_GROUP_NONE, N_("Use File Cache:"), VIK_LAYER_WIDGET_CHECKBUTTON, NULL, NULL,
  86     NULL, vik_lpd_true_default, NULL, NULL },
  87   { VIK_LAYER_MAPNIK, "file-cache-dir", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("File Cache Directory:"), VIK_LAYER_WIDGET_FOLDERENTRY, NULL, NULL,
  88     NULL, cache_dir_default, NULL, NULL },
  89 };
  90
  91 enum {
  92   PARAM_CONFIG_CSS = 0,
  93   PARAM_CONFIG_XML,
  94   PARAM_ALPHA,
  95   PARAM_USE_FILE_CACHE,
  96   PARAM_FILE_CACHE_DIR,
  97   NUM_PARAMS };
  98
  99 static const gchar* mapnik_layer_tooltip ( VikMapnikLayer *vml );
 100 static void mapnik_layer_marshall( VikMapnikLayer *vml, guint8 **data, gint *len );
 101 static VikMapnikLayer *mapnik_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
 102 static gboolean mapnik_layer_set_param ( VikMapnikLayer *vml, guint16 id, VikLayerParamData data, VikViewport *vp, gboolean is_file_operation );
 103 static VikLayerParamData mapnik_layer_get_param ( VikMapnikLayer *vml, guint16 id, gboolean is_file_operation );
 104 static VikMapnikLayer *mapnik_layer_new ( VikViewport *vvp );
 105 static VikMapnikLayer *mapnik_layer_create ( VikViewport *vp );
 106 static void mapnik_layer_free ( VikMapnikLayer *vml );
 107 static void mapnik_layer_draw ( VikMapnikLayer *vml, VikViewport *vp );
 108 static void mapnik_layer_add_menu_items ( VikMapnikLayer *vml, GtkMenu *menu, gpointer vlp );
 109
 110 static gpointer mapnik_feature_create ( VikWindow *vw, VikViewport *vvp)
 111 {
 112   return vvp;
 113 }
 114
 115 static gboolean mapnik_feature_release ( VikMapnikLayer *vml, GdkEventButton *event, VikViewport *vvp );
 116
 117 // See comment in viktrwlayer.c for advice on values used
 118 // FUTURE:
 119 static VikToolInterface mapnik_tools[] = {
 120         // Layer Info
 121         // Zoom All?
 122   { { "MapnikFeatures", GTK_STOCK_INFO, N_("_Mapnik Features"), NULL, N_("Mapnik Features"), 0 },
 123     (VikToolConstructorFunc) mapnik_feature_create,
 124     NULL,
 125     NULL,
 126     NULL,
 127     NULL,
 128     NULL,
 129     (VikToolMouseFunc) mapnik_feature_release,
 130     NULL,
 131     FALSE,
 132     GDK_LEFT_PTR, NULL, NULL },
 133 };
 134
 135 static void mapnik_layer_post_read (VikLayer *vl, VikViewport *vvp, gboolean from_file);
 136
 137 VikLayerInterface vik_mapnik_layer_interface = {
 138         "Mapnik Rendering",
 139         N_("Mapnik Rendering"),
 140         NULL,
 141         &vikmapniklayer_pixbuf, // icon
 142
 143         mapnik_tools,
 144         sizeof(mapnik_tools) / sizeof(VikToolInterface),
 145
 146         mapnik_layer_params,
 147         NUM_PARAMS,
 148         NULL,
 149         0,
 150
 151         VIK_MENU_ITEM_ALL,
 152
 153         (VikLayerFuncCreate)                  mapnik_layer_create,
 154         (VikLayerFuncRealize)                 NULL,
 155         (VikLayerFuncPostRead)                mapnik_layer_post_read,
 156         (VikLayerFuncFree)                    mapnik_layer_free,
 157
 158         (VikLayerFuncProperties)              NULL,
 159         (VikLayerFuncDraw)                    mapnik_layer_draw,
 160         (VikLayerFuncChangeCoordMode)         NULL,
 161
 162         (VikLayerFuncGetTimestamp)            NULL,
 163
 164         (VikLayerFuncSetMenuItemsSelection)   NULL,
 165         (VikLayerFuncGetMenuItemsSelection)   NULL,
 166
 167         (VikLayerFuncAddMenuItems)            mapnik_layer_add_menu_items,
 168         (VikLayerFuncSublayerAddMenuItems)    NULL,
 169
 170         (VikLayerFuncSublayerRenameRequest)   NULL,
 171         (VikLayerFuncSublayerToggleVisible)   NULL,
 172         (VikLayerFuncSublayerTooltip)         NULL,
 173         (VikLayerFuncLayerTooltip)            mapnik_layer_tooltip,
 174         (VikLayerFuncLayerSelected)           NULL,
 175
 176         (VikLayerFuncMarshall)                mapnik_layer_marshall,
 177         (VikLayerFuncUnmarshall)              mapnik_layer_unmarshall,
 178
 179         (VikLayerFuncSetParam)                mapnik_layer_set_param,
 180         (VikLayerFuncGetParam)                mapnik_layer_get_param,
 181         (VikLayerFuncChangeParam)             NULL,
 182
 183         (VikLayerFuncReadFileData)            NULL,
 184         (VikLayerFuncWriteFileData)           NULL,
 185
 186         (VikLayerFuncDeleteItem)              NULL,
 187         (VikLayerFuncCutItem)                 NULL,
 188         (VikLayerFuncCopyItem)                NULL,
 189         (VikLayerFuncPasteItem)               NULL,
 190         (VikLayerFuncFreeCopiedItem)          NULL,
 191         (VikLayerFuncDragDropRequest)         NULL,
 192
 193         (VikLayerFuncSelectClick)             NULL,
 194         (VikLayerFuncSelectMove)              NULL,
 195         (VikLayerFuncSelectRelease)           NULL,
 196         (VikLayerFuncSelectedViewportMenu)    NULL,
 197 };
 198
 199 struct _VikMapnikLayer {
 200         VikLayer vl;
 201         gchar *filename_css; // CartoCSS MML File - use 'carto' to convert into xml
 202         gchar *filename_xml;
 203         guint8 alpha;
 204
 205         guint tile_size_x; // Y is the same as X ATM
 206         gboolean loaded;
 207         MapnikInterface* mi;
 208         guint rerender_timeout;
 209
 210         gboolean use_file_cache;
 211         gchar *file_cache_dir;
 212
 213         VikCoord rerender_ul;
 214         VikCoord rerender_br;
 215         gdouble rerender_zoom;
 216         GtkWidget *right_click_menu;
 217 };
 218
 219 #define MAPNIK_PREFS_GROUP_KEY "mapnik"
 220 #define MAPNIK_PREFS_NAMESPACE "mapnik."
 221
 222 static VikLayerParamData plugins_default ( void )
 223 {
 224         VikLayerParamData data;
 225 #ifdef WINDOWS
 226         data.s = g_strdup ( "input" );
 227 #else
 228         if ( g_file_test ( "/usr/lib/mapnik/input", G_FILE_TEST_EXISTS ) )
 229                 data.s = g_strdup ( "/usr/lib/mapnik/input" );
 230                 // Current Debian locations
 231         else if ( g_file_test ( "/usr/lib/mapnik/3.0/input", G_FILE_TEST_EXISTS ) )
 232                 data.s = g_strdup ( "/usr/lib/mapnik/3.0/input" );
 233         else if ( g_file_test ( "/usr/lib/mapnik/2.2/input", G_FILE_TEST_EXISTS ) )
 234                 data.s = g_strdup ( "/usr/lib/mapnik/2.2/input" );
 235         else
 236                 data.s = g_strdup ( "" );
 237 #endif
 238         return data;
 239 }
 240
 241 static VikLayerParamData fonts_default ( void )
 242 {
 243         // Possibly should be string list to allow loading from multiple directories
 244         VikLayerParamData data;
 245 #ifdef WINDOWS
 246         data.s = g_strdup ( "C:\\Windows\\Fonts" );
 247 #elif defined __APPLE__
 248         data.s = g_strdup ( "/Library/Fonts" );
 249 #else
 250         data.s = g_strdup ( "/usr/share/fonts" );
 251 #endif
 252         return data;
 253 }
 254
 255 static VikLayerParam prefs[] = {
 256         // Changing these values only applies before first mapnik layer is 'created'
 257         { VIK_LAYER_NUM_TYPES, MAPNIK_PREFS_NAMESPACE"plugins_directory", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("Plugins Directory:"), VIK_LAYER_WIDGET_FOLDERENTRY, NULL, NULL, N_("You need to restart Viking for a change to this value to be used"), plugins_default, NULL, NULL },
 258         { VIK_LAYER_NUM_TYPES, MAPNIK_PREFS_NAMESPACE"fonts_directory", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("Fonts Directory:"), VIK_LAYER_WIDGET_FOLDERENTRY, NULL, NULL, N_("You need to restart Viking for a change to this value to be used"), fonts_default, NULL, NULL },
 259         { VIK_LAYER_NUM_TYPES, MAPNIK_PREFS_NAMESPACE"recurse_fonts_directory", VIK_LAYER_PARAM_BOOLEAN, VIK_LAYER_GROUP_NONE, N_("Recurse Fonts Directory:"), VIK_LAYER_WIDGET_CHECKBUTTON, NULL, NULL, N_("You need to restart Viking for a change to this value to be used"), vik_lpd_true_default, NULL, NULL },
 260         { VIK_LAYER_NUM_TYPES, MAPNIK_PREFS_NAMESPACE"rerender_after", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Rerender Timeout (hours):"), VIK_LAYER_WIDGET_SPINBUTTON, &scales[2], NULL, N_("You need to restart Viking for a change to this value to be used"), NULL, NULL, NULL },
 261         // Changeable any time
 262         { VIK_LAYER_NUM_TYPES, MAPNIK_PREFS_NAMESPACE"carto", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("CartoCSS:"), VIK_LAYER_WIDGET_FILEENTRY, NULL, NULL,  N_("The program to convert CartoCSS files into Mapnik XML"), NULL, NULL, NULL },
 263 };
 264
 265 static time_t planet_import_time;
 266
 267 static GMutex *tp_mutex;
 268 static GHashTable *requests = NULL;
 269
 270 /**
 271  * vik_mapnik_layer_init:
 272  *
 273  * Just initialize preferences
 274  */
 275 void vik_mapnik_layer_init (void)
 276 {
 277         a_preferences_register_group ( MAPNIK_PREFS_GROUP_KEY, "Mapnik" );
 278
 279         guint i = 0;
 280         VikLayerParamData tmp = plugins_default();
 281         a_preferences_register(&prefs[i++], tmp, MAPNIK_PREFS_GROUP_KEY);
 282
 283         tmp = fonts_default();
 284         a_preferences_register(&prefs[i++], tmp, MAPNIK_PREFS_GROUP_KEY);
 285
 286         tmp.b = TRUE;
 287         a_preferences_register(&prefs[i++], tmp, MAPNIK_PREFS_GROUP_KEY);
 288
 289         tmp.u = 168; // One week
 290         a_preferences_register(&prefs[i++], tmp, MAPNIK_PREFS_GROUP_KEY);
 291
 292         tmp.s = "carto";
 293         a_preferences_register(&prefs[i++], tmp, MAPNIK_PREFS_GROUP_KEY);
 294 }
 295
 296 /**
 297  * vik_mapnik_layer_post_init:
 298  *
 299  * Initialize data structures - now that reading preferences is OK to perform
 300  */
 301 void vik_mapnik_layer_post_init (void)
 302 {
 303         tp_mutex = vik_mutex_new();
 304
 305         // Just storing keys only
 306         requests = g_hash_table_new_full ( g_str_hash, g_str_equal, g_free, NULL );
 307
 308         guint hours = a_preferences_get (MAPNIK_PREFS_NAMESPACE"rerender_after")->u;
 309         GDateTime *now = g_date_time_new_now_local ();
 310         GDateTime *then = g_date_time_add_hours (now, -hours);
 311         planet_import_time = g_date_time_to_unix (then);
 312         g_date_time_unref ( now );
 313         g_date_time_unref ( then );
 314
 315         GStatBuf gsb;
 316         // Similar to mod_tile method to mark DB has been imported/significantly changed to cause a rerendering of all tiles
 317         gchar *import_time_file = g_strconcat ( a_get_viking_dir(), G_DIR_SEPARATOR_S, "planet-import-complete", NULL );
 318         if ( g_stat ( import_time_file, &gsb ) == 0 ) {
 319                 // Only update if newer
 320                 if ( planet_import_time > gsb.st_mtime )
 321                         planet_import_time = gsb.st_mtime;
 322         }
 323         g_free ( import_time_file );
 324 }
 325
 326 void vik_mapnik_layer_uninit ()
 327 {
 328         vik_mutex_free (tp_mutex);
 329 }
 330
 331 // NB Only performed once per program run
 332 static void mapnik_layer_class_init ( VikMapnikLayerClass *klass )
 333 {
 334         VikLayerParamData *pd = a_preferences_get (MAPNIK_PREFS_NAMESPACE"plugins_directory");
 335         VikLayerParamData *fd = a_preferences_get (MAPNIK_PREFS_NAMESPACE"fonts_directory");
 336         VikLayerParamData *rfd = a_preferences_get (MAPNIK_PREFS_NAMESPACE"recurse_fonts_directory");
 337
 338         if ( pd && fd && rfd )
 339                 mapnik_interface_initialize ( pd->s, fd->s, rfd->b );
 340         else
 341                 g_critical ( "Unable to initialize mapnik interface from preferences" );
 342 }
 343
 344 GType vik_mapnik_layer_get_type ()
 345 {
 346         static GType vml_type = 0;
 347
 348         if (!vml_type) {
 349                 static const GTypeInfo vml_info = {
 350                         sizeof (VikMapnikLayerClass),
 351                         NULL, /* base_init */
 352                         NULL, /* base_finalize */
 353                         (GClassInitFunc) mapnik_layer_class_init, /* class init */
 354                         NULL, /* class_finalize */
 355                         NULL, /* class_data */
 356                         sizeof (VikMapnikLayer),
 357                         0,
 358                         NULL /* instance init */
 359                 };
 360                 vml_type = g_type_register_static ( VIK_LAYER_TYPE, "VikMapnikLayer", &vml_info, 0 );
 361         }
 362
 363         return vml_type;
 364 }
 365
 366 static const gchar* mapnik_layer_tooltip ( VikMapnikLayer *vml )
 367 {
 368         return vml->filename_xml;
 369 }
 370
 371 static void mapnik_layer_set_file_xml ( VikMapnikLayer *vml, const gchar *name )
 372 {
 373         if ( vml->filename_xml )
 374                 g_free (vml->filename_xml);
 375         // Mapnik doesn't seem to cope with relative filenames
 376         if ( g_strcmp0 (name, "" ) )
 377                 vml->filename_xml = vu_get_canonical_filename ( VIK_LAYER(vml), name);
 378         else
 379                 vml->filename_xml = g_strdup (name);
 380 }
 381
 382 static void mapnik_layer_set_file_css ( VikMapnikLayer *vml, const gchar *name )
 383 {
 384         if ( vml->filename_css )
 385                 g_free (vml->filename_css);
 386         vml->filename_css = g_strdup (name);
 387 }
 388
 389 static void mapnik_layer_set_cache_dir ( VikMapnikLayer *vml, const gchar *name )
 390 {
 391         if ( vml->file_cache_dir )
 392                 g_free (vml->file_cache_dir);
 393         vml->file_cache_dir = g_strdup (name);
 394 }
 395
 396 static void mapnik_layer_marshall( VikMapnikLayer *vml, guint8 **data, gint *len )
 397 {
 398         vik_layer_marshall_params ( VIK_LAYER(vml), data, len );
 399 }
 400
 401 static VikMapnikLayer *mapnik_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
 402 {
 403         VikMapnikLayer *rv = mapnik_layer_new ( vvp );
 404         vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
 405         return rv;
 406 }
 407
 408 static gboolean mapnik_layer_set_param ( VikMapnikLayer *vml, guint16 id, VikLayerParamData data, VikViewport *vp, gboolean is_file_operation )
 409 {
 410         switch ( id ) {
 411                 case PARAM_CONFIG_CSS: mapnik_layer_set_file_css (vml, data.s); break;
 412                 case PARAM_CONFIG_XML: mapnik_layer_set_file_xml (vml, data.s); break;
 413                 case PARAM_ALPHA: if ( data.u <= 255 ) vml->alpha = data.u; break;
 414                 case PARAM_USE_FILE_CACHE: vml->use_file_cache = data.b; break;
 415                 case PARAM_FILE_CACHE_DIR: mapnik_layer_set_cache_dir (vml, data.s); break;
 416                 default: break;
 417         }
 418         return TRUE;
 419 }
 420
 421 static VikLayerParamData mapnik_layer_get_param ( VikMapnikLayer *vml, guint16 id, gboolean is_file_operation )
 422 {
 423         VikLayerParamData data;
 424         switch ( id ) {
 425                 case PARAM_CONFIG_CSS: {
 426                         data.s = vml->filename_css;
 427                         gboolean set = FALSE;
 428                         if ( is_file_operation ) {
 429                                 if ( a_vik_get_file_ref_format() == VIK_FILE_REF_FORMAT_RELATIVE ) {
 430                                         gchar *cwd = g_get_current_dir();
 431                                         if ( cwd ) {
 432                                                 data.s = file_GetRelativeFilename ( cwd, vml->filename_css );
 433                                                 if ( !data.s ) data.s = "";
 434                                                 set = TRUE;
 435                                         }
 436                                 }
 437                         }
 438                         if ( !set )
 439                                 data.s = vml->filename_css ? vml->filename_css : "";
 440                         break;
 441                 }
 442                 case PARAM_CONFIG_XML: {
 443                         data.s = vml->filename_xml;
 444                         gboolean set = FALSE;
 445                         if ( is_file_operation ) {
 446                                 if ( a_vik_get_file_ref_format() == VIK_FILE_REF_FORMAT_RELATIVE ) {
 447                                         gchar *cwd = g_get_current_dir();
 448                                         if ( cwd ) {
 449                                                 data.s = file_GetRelativeFilename ( cwd, vml->filename_xml );
 450                                                 if ( !data.s ) data.s = "";
 451                                                 set = TRUE;
 452                                         }
 453                                 }
 454                         }
 455                         if ( !set )
 456                                 data.s = vml->filename_xml ? vml->filename_xml : "";
 457                         break;
 458                 }
 459                 case PARAM_ALPHA: data.u = vml->alpha; break;
 460                 case PARAM_USE_FILE_CACHE: data.b = vml->use_file_cache; break;
 461                 case PARAM_FILE_CACHE_DIR: data.s = vml->file_cache_dir; break;
 462                 default: break;
 463         }
 464         return data;
 465 }
 466
 467 /**
 468  *
 469  */
 470 static VikMapnikLayer *mapnik_layer_new ( VikViewport *vvp )
 471 {
 472         VikMapnikLayer *vml = VIK_MAPNIK_LAYER ( g_object_new ( VIK_MAPNIK_LAYER_TYPE, NULL ) );
 473         vik_layer_set_type ( VIK_LAYER(vml), VIK_LAYER_MAPNIK );
 474         vik_layer_set_defaults ( VIK_LAYER(vml), vvp );
 475         vml->tile_size_x = size_default().u; // FUTURE: Is there any use in this being configurable?
 476         vml->loaded = FALSE;
 477         vml->mi = mapnik_interface_new();
 478         return vml;
 479 }
 480
 481 /**
 482  * Run carto command
 483  * ATM don't have any version issues AFAIK
 484  * Tested with carto 0.14.0
 485  */
 486 gboolean carto_load ( VikMapnikLayer *vml, VikViewport *vvp )
 487 {
 488         gchar *mystdout = NULL;
 489         gchar *mystderr = NULL;
 490         GError *error = NULL;
 491
 492         VikLayerParamData *vlpd = a_preferences_get(MAPNIK_PREFS_NAMESPACE"carto");
 493         gchar *command = g_strdup_printf ( "%s %s", vlpd->s, vml->filename_css );
 494
 495         gboolean answer = TRUE;
 496         //gchar *args[2]; args[0] = vlpd->s; args[1] = vml->filename_css;
 497         //GPid pid;
 498         //if ( g_spawn_async_with_pipes ( NULL, args, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, &pid, NULL, &carto_stdout, &carto_error, &error ) ) {
 499         // cf code in babel.c to handle stdout
 500
 501         // NB Running carto may take several seconds
 502         //  especially for large style sheets like the default OSM Mapnik style (~6 seconds on my system)
 503         VikWindow *vw = VIK_WINDOW(VIK_GTK_WINDOW_FROM_WIDGET(vvp));
 504         if ( vw ) {
 505                 gchar *msg = g_strdup_printf ( "%s: %s", _("Running"), command );
 506                 vik_window_statusbar_update ( vw, msg, VIK_STATUSBAR_INFO );
 507                 vik_window_set_busy_cursor ( vw );
 508         }
 509
 510         gint64 tt1 = 0;
 511         gint64 tt2 = 0;
 512         // You won't get a sensible timing measurement if running too old a GLIB
 513 #if GLIB_CHECK_VERSION (2, 28, 0)
 514         tt1 = g_get_real_time ();
 515 #endif
 516
 517         if ( g_spawn_command_line_sync ( command, &mystdout, &mystderr, NULL, &error ) ) {
 518 #if GLIB_CHECK_VERSION (2, 28, 0)
 519                 tt2 = g_get_real_time ();
 520 #endif
 521                 if ( mystderr )
 522                         if ( strlen(mystderr) > 1 ) {
 523                                 a_dialog_error_msg_extra ( VIK_GTK_WINDOW_FROM_WIDGET(vvp), _("Error running carto command:\n%s"), mystderr );
 524                                 answer = FALSE;
 525                         }
 526                 if ( mystdout ) {
 527                         // NB This will overwrite the specified XML file
 528                         if ( ! ( vml->filename_xml && strlen (vml->filename_xml) > 1 ) ) {
 529                                 // XML Not specified so try to create based on CSS file name
 530                                 GRegex *regex = g_regex_new ( "\\.mml$|\\.mss|\\.css$", G_REGEX_CASELESS, 0, &error );
 531                                 if ( error )
 532                                         g_critical ("%s: %s", __FUNCTION__, error->message );
 533                                 if ( vml->filename_xml )
 534                                         g_free (vml->filename_xml);
 535                                 vml->filename_xml = g_regex_replace_literal ( regex, vml->filename_css, -1, 0, ".xml", 0, &error );
 536                                 if ( error )
 537                                         g_warning ("%s: %s", __FUNCTION__, error->message );
 538                                 // Prevent overwriting self
 539                                 if ( !g_strcmp0 ( vml->filename_xml, vml->filename_css ) ) {
 540                                         vml->filename_xml = g_strconcat ( vml->filename_css, ".xml", NULL );
 541                                 }
 542                                 g_regex_unref ( regex );
 543                         }
 544                         if ( !g_file_set_contents (vml->filename_xml, mystdout, -1, &error)  ) {
 545                                 g_warning ("%s: %s", __FUNCTION__, error->message );
 546                                 g_error_free (error);
 547                         }
 548                 }
 549                 g_free ( mystdout );
 550                 g_free ( mystderr );
 551         }
 552         else {
 553                 g_warning ("%s: %s", __FUNCTION__, error->message );
 554                 g_error_free (error);
 555         }
 556         g_free ( command );
 557
 558         if ( vw ) {
 559                 gchar *msg = g_strdup_printf ( "%s %s %.1f %s",  vlpd->s, _(" completed in "), (gdouble)(tt2-tt1)/G_USEC_PER_SEC, _("seconds") );
 560                 vik_window_statusbar_update ( vw, msg, VIK_STATUSBAR_INFO );
 561                 g_free ( msg );
 562                 vik_window_clear_busy_cursor ( vw );
 563         }
 564         return answer;
 565 }
 566
 567 /**
 568  *
 569  */
 570 static void mapnik_layer_post_read (VikLayer *vl, VikViewport *vvp, gboolean from_file)
 571 {
 572         VikMapnikLayer *vml = VIK_MAPNIK_LAYER(vl);
 573
 574         // Determine if carto needs to be run
 575         gboolean do_carto = FALSE;
 576         if ( vml->filename_css && strlen(vml->filename_css) > 1 ) {
 577                 if ( vml->filename_xml && strlen(vml->filename_xml) > 1) {
 578                         // Compare timestamps
 579                         GStatBuf gsb1;
 580                         if ( g_stat ( vml->filename_xml, &gsb1 ) == 0 ) {
 581                                 GStatBuf gsb2;
 582                                 if ( g_stat ( vml->filename_css, &gsb2 ) == 0 ) {
 583                                         // Is CSS file newer than the XML file
 584                                         if ( gsb2.st_mtime > gsb1.st_mtime )
 585                                                 do_carto = TRUE;
 586                                         else
 587                                                 g_debug ( "No need to run carto" );
 588                                 }
 589                         }
 590                         else {
 591                                 // XML file doesn't exist
 592                                 do_carto = TRUE;
 593                         }
 594                 }
 595                 else {
 596                         // No XML specified thus need to generate
 597                         do_carto = TRUE;
 598                 }
 599         }
 600
 601         if ( do_carto )
 602                 // Don't load the XML config if carto load fails
 603                 if ( !carto_load ( vml, vvp ) )
 604                         return;
 605
 606         gchar* ans = mapnik_interface_load_map_file ( vml->mi, vml->filename_xml, vml->tile_size_x, vml->tile_size_x );
 607         if ( ans ) {
 608                 a_dialog_error_msg_extra ( VIK_GTK_WINDOW_FROM_WIDGET(vvp),
 609                                            _("Mapnik error loading configuration file:\n%s"),
 610                                            ans );
 611                 g_free ( ans );
 612         }
 613         else {
 614                 vml->loaded = TRUE;
 615                 if ( !from_file )
 616                         ui_add_recent_file ( vml->filename_xml );
 617         }
 618 }
 619
 620 #define MAPNIK_LAYER_FILE_CACHE_LAYOUT "%s"G_DIR_SEPARATOR_S"%d"G_DIR_SEPARATOR_S"%d"G_DIR_SEPARATOR_S"%d.png"
 621
 622 // Free returned string after use
 623 static gchar *get_filename ( gchar *dir, guint x, guint y, guint z)
 624 {
 625         return g_strdup_printf ( MAPNIK_LAYER_FILE_CACHE_LAYOUT, dir, (17-z), x, y );
 626 }
 627
 628 static void possibly_save_pixbuf ( VikMapnikLayer *vml, GdkPixbuf *pixbuf, MapCoord *ulm )
 629 {
 630         if ( vml->use_file_cache ) {
 631                 if ( vml->file_cache_dir ) {
 632                         GError *error = NULL;
 633                         gchar *filename = get_filename ( vml->file_cache_dir, ulm->x, ulm->y, ulm->scale );
 634
 635                         gchar *dir = g_path_get_dirname ( filename );
 636                         if ( !g_file_test ( filename, G_FILE_TEST_EXISTS ) )
 637                                 if ( g_mkdir_with_parents ( dir , 0777 ) != 0 )
 638                                         g_warning ("%s: Failed to mkdir %s", __FUNCTION__, dir );
 639                         g_free ( dir );
 640
 641                         if ( !gdk_pixbuf_save (pixbuf, filename, "png", &error, NULL ) ) {
 642                                 g_warning ("%s: %s", __FUNCTION__, error->message );
 643                                 g_error_free (error);
 644                         }
 645                         g_free (filename);
 646                 }
 647         }
 648 }
 649
 650 typedef struct
 651 {
 652         VikMapnikLayer *vml;
 653         VikCoord *ul;
 654         VikCoord *br;
 655         MapCoord *ulmc;
 656         const gchar* request;
 657 } RenderInfo;
 658
 659 /**
 660  * render:
 661  *
 662  * Common render function which can run in separate thread
 663  */
 664 static void render ( VikMapnikLayer *vml, VikCoord *ul, VikCoord *br, MapCoord *ulm )
 665 {
 666         gint64 tt1 = g_get_real_time ();
 667         GdkPixbuf *pixbuf = mapnik_interface_render ( vml->mi, ul->north_south, ul->east_west, br->north_south, br->east_west );
 668         gint64 tt2 = g_get_real_time ();
 669         gdouble tt = (gdouble)(tt2-tt1)/1000000;
 670         g_debug ( "Mapnik rendering completed in %.3f seconds", tt );
 671         if ( !pixbuf ) {
 672                 // A pixbuf to stick into cache incase of an unrenderable area - otherwise will get continually re-requested
 673                 pixbuf = gdk_pixbuf_scale_simple ( gdk_pixbuf_from_pixdata(&vikmapniklayer_pixbuf, FALSE, NULL), vml->tile_size_x, vml->tile_size_x, GDK_INTERP_BILINEAR );
 674         }
 675         possibly_save_pixbuf ( vml, pixbuf, ulm );
 676
 677         // NB Mapnik can apply alpha, but use our own function for now
 678         if ( vml->alpha < 255 )
 679                 pixbuf = ui_pixbuf_scale_alpha ( pixbuf, vml->alpha );
 680         a_mapcache_add ( pixbuf, (mapcache_extra_t){ tt }, ulm->x, ulm->y, ulm->z, MAP_ID_MAPNIK_RENDER, ulm->scale, vml->alpha, 0.0, 0.0, vml->filename_xml );
 681         g_object_unref(pixbuf);
 682 }
 683
 684 static void render_info_free ( RenderInfo *data )
 685 {
 686         g_free ( data->ul );
 687         g_free ( data->br );
 688         g_free ( data->ulmc );
 689         // NB No need to free the request/key - as this is freed by the hash table destructor
 690         g_free ( data );
 691 }
 692
 693 static void background ( RenderInfo *data, gpointer threaddata )
 694 {
 695         int res = a_background_thread_progress ( threaddata, 0 );
 696         if (res == 0) {
 697                 render ( data->vml, data->ul, data->br, data->ulmc );
 698         }
 699
 700         g_mutex_lock(tp_mutex);
 701         g_hash_table_remove (requests, data->request);
 702         g_mutex_unlock(tp_mutex);
 703
 704         if (res == 0)
 705                 vik_layer_emit_update ( VIK_LAYER(data->vml) ); // NB update display from background
 706 }
 707
 708 static void render_cancel_cleanup (RenderInfo *data)
 709 {
 710         // Anything?
 711 }
 712
 713 #define REQUEST_HASHKEY_FORMAT "%d-%d-%d-%d-%d"
 714
 715 /**
 716  * Thread
 717  */
 718 static void thread_add (VikMapnikLayer *vml, MapCoord *mul, VikCoord *ul, VikCoord *br, gint x, gint y, gint z, gint zoom, const gchar* name )
 719 {
 720         // Create request
 721         guint nn = name ? g_str_hash ( name ) : 0;
 722         gchar *request = g_strdup_printf ( REQUEST_HASHKEY_FORMAT, x, y, z, zoom, nn );
 723
 724         g_mutex_lock(tp_mutex);
 725
 726         if ( g_hash_table_lookup_extended (requests, request, NULL, NULL ) ) {
 727                 g_free ( request );
 728                 g_mutex_unlock (tp_mutex);
 729                 return;
 730         }
 731
 732         RenderInfo *ri = g_malloc ( sizeof(RenderInfo) );
 733         ri->vml = vml;
 734         ri->ul = g_malloc ( sizeof(VikCoord) );
 735         ri->br = g_malloc ( sizeof(VikCoord) );
 736         ri->ulmc = g_malloc ( sizeof(MapCoord) );
 737         memcpy(ri->ul, ul, sizeof(VikCoord));
 738         memcpy(ri->br, br, sizeof(VikCoord));
 739         memcpy(ri->ulmc, mul, sizeof(MapCoord));
 740         ri->request = request;
 741
 742         g_hash_table_insert ( requests, request, NULL );
 743
 744         g_mutex_unlock (tp_mutex);
 745
 746         gchar *basename = g_path_get_basename (name);
 747         gchar *description = g_strdup_printf ( _("Mapnik Render %d:%d:%d %s"), zoom, x, y, basename );
 748         g_free ( basename );
 749         a_background_thread ( BACKGROUND_POOL_LOCAL_MAPNIK,
 750                               VIK_GTK_WINDOW_FROM_LAYER(vml),
 751                               description,
 752                               (vik_thr_func) background,
 753                               ri,
 754                               (vik_thr_free_func) render_info_free,
 755                               (vik_thr_free_func) render_cancel_cleanup,
 756                               1 );
 757         g_free ( description );
 758 }
 759
 760 /**
 761  * load_pixbuf:
 762  *
 763  * If function returns GdkPixbuf properly, reference counter to this
 764  * buffer has to be decreased, when buffer is no longer needed.
 765  */
 766 static GdkPixbuf *load_pixbuf ( VikMapnikLayer *vml, MapCoord *ulm, MapCoord *brm, gboolean *rerender )
 767 {
 768         *rerender = FALSE;
 769         GdkPixbuf *pixbuf = NULL;
 770         gchar *filename = get_filename ( vml->file_cache_dir, ulm->x, ulm->y, ulm->scale );
 771
 772         GStatBuf gsb;
 773         if ( g_stat ( filename, &gsb ) == 0 ) {
 774                 // Get from disk
 775                 GError *error = NULL;
 776                 pixbuf = gdk_pixbuf_new_from_file ( filename, &error );
 777                 if ( error ) {
 778                         g_warning ("%s: %s", __FUNCTION__, error->message );
 779                         g_error_free ( error );
 780                 }
 781                 else {
 782                         if ( vml->alpha < 255 )
 783                                 pixbuf = ui_pixbuf_set_alpha ( pixbuf, vml->alpha );
 784                         a_mapcache_add ( pixbuf, (mapcache_extra_t) { -42.0 }, ulm->x, ulm->y, ulm->z, MAP_ID_MAPNIK_RENDER, ulm->scale, vml->alpha, 0.0, 0.0, vml->filename_xml );
 785                 }
 786                 // If file is too old mark for rerendering
 787                 if ( planet_import_time < gsb.st_mtime ) {
 788                         *rerender = TRUE;
 789                 }
 790         }
 791         g_free ( filename );
 792
 793         return pixbuf;
 794 }
 795
 796 /**
 797  * Caller has to decrease reference counter of returned
 798  * GdkPixbuf, when buffer is no longer needed.
 799  */
 800 static GdkPixbuf *get_pixbuf ( VikMapnikLayer *vml, MapCoord *ulm, MapCoord *brm )
 801 {
 802         VikCoord ul; VikCoord br;
 803         GdkPixbuf *pixbuf = NULL;
 804
 805         map_utils_iTMS_to_vikcoord (ulm, &ul);
 806         map_utils_iTMS_to_vikcoord (brm, &br);
 807
 808         pixbuf = a_mapcache_get ( ulm->x, ulm->y, ulm->z, MAP_ID_MAPNIK_RENDER, ulm->scale, vml->alpha, 0.0, 0.0, vml->filename_xml );
 809
 810         if ( ! pixbuf ) {
 811                 gboolean rerender = FALSE;
 812                 if ( vml->use_file_cache && vml->file_cache_dir )
 813                         pixbuf = load_pixbuf ( vml, ulm, brm, &rerender );
 814                 if ( ! pixbuf || rerender ) {
 815                         if ( TRUE )
 816                                 thread_add (vml, ulm, &ul, &br, ulm->x, ulm->y, ulm->z, ulm->scale, vml->filename_xml );
 817                         else {
 818                                 // Run in the foreground
 819                                 render ( vml, &ul, &br, ulm );
 820                                 vik_layer_emit_update ( VIK_LAYER(vml) );
 821                         }
 822                 }
 823         }
 824
 825         return pixbuf;
 826 }
 827
 828 /**
 829  *
 830  */
 831 static void mapnik_layer_draw ( VikMapnikLayer *vml, VikViewport *vvp )
 832 {
 833         if ( !vml->loaded )
 834                 return;
 835
 836         if ( vik_viewport_get_drawmode(vvp) != VIK_VIEWPORT_DRAWMODE_MERCATOR ) {
 837                 vik_statusbar_set_message ( vik_window_get_statusbar (VIK_WINDOW(VIK_GTK_WINDOW_FROM_LAYER(vml))),
 838                                             VIK_STATUSBAR_INFO, _("Mapnik Rendering must be in Mercator mode") );
 839                 return;
 840         }
 841
 842         if ( vml->mi ) {
 843                 gchar *copyright = mapnik_interface_get_copyright ( vml->mi );
 844                 if ( copyright ) {
 845                         vik_viewport_add_copyright ( vvp, copyright );
 846                 }
 847         }
 848
 849         VikCoord ul, br;
 850         ul.mode = VIK_COORD_LATLON;
 851         br.mode = VIK_COORD_LATLON;
 852         vik_viewport_screen_to_coord ( vvp, 0, 0, &ul );
 853         vik_viewport_screen_to_coord ( vvp, vik_viewport_get_width(vvp), vik_viewport_get_height(vvp), &br );
 854
 855         gdouble xzoom = vik_viewport_get_xmpp ( vvp );
 856         gdouble yzoom = vik_viewport_get_ympp ( vvp );
 857
 858         MapCoord ulm, brm;
 859
 860         if ( map_utils_vikcoord_to_iTMS ( &ul, xzoom, yzoom, &ulm ) &&
 861              map_utils_vikcoord_to_iTMS ( &br, xzoom, yzoom, &brm ) ) {
 862                 // TODO: Understand if tilesize != 256 does this need to use shrinkfactors??
 863                 GdkPixbuf *pixbuf;
 864                 VikCoord coord;
 865                 gint xx, yy;
 866
 867                 gint xmin = MIN(ulm.x, brm.x), xmax = MAX(ulm.x, brm.x);
 868                 gint ymin = MIN(ulm.y, brm.y), ymax = MAX(ulm.y, brm.y);
 869
 870                 // Split rendering into a grid for the current viewport
 871                 //  thus each individual 'tile' can then be stored in the map cache
 872                 for (gint x = xmin; x <= xmax; x++ ) {
 873                         for (gint y = ymin; y <= ymax; y++ ) {
 874                                 ulm.x = x;
 875                                 ulm.y = y;
 876                                 brm.x = x+1;
 877                                 brm.y = y+1;
 878
 879                                 pixbuf = get_pixbuf ( vml, &ulm, &brm );
 880
 881                                 if ( pixbuf ) {
 882                                         map_utils_iTMS_to_vikcoord ( &ulm, &coord );
 883                                         vik_viewport_coord_to_screen ( vvp, &coord, &xx, &yy );
 884                                         vik_viewport_draw_pixbuf ( vvp, pixbuf, 0, 0, xx, yy, vml->tile_size_x, vml->tile_size_x );
 885                                         g_object_unref(pixbuf);
 886                                 }
 887                         }
 888                 }
 889
 890                 // Done after so drawn on top
 891                 // Just a handy guide to tile blocks.
 892                 if ( vik_debug && vik_verbose ) {
 893                         GdkGC *black_gc = GTK_WIDGET(vvp)->style->black_gc;
 894                         gint width = vik_viewport_get_width(vvp);
 895                         gint height = vik_viewport_get_height(vvp);
 896                         gint xx, yy;
 897                         ulm.x = xmin; ulm.y = ymin;
 898                         map_utils_iTMS_to_center_vikcoord ( &ulm, &coord );
 899                         vik_viewport_coord_to_screen ( vvp, &coord, &xx, &yy );
 900                         xx = xx - (vml->tile_size_x/2);
 901                         yy = yy - (vml->tile_size_x/2); // Yes use X ATM
 902                         for (gint x = xmin; x <= xmax; x++ ) {
 903                                 vik_viewport_draw_line ( vvp, black_gc, xx, 0, xx, height );
 904                                 xx += vml->tile_size_x;
 905                         }
 906                         for (gint y = ymin; y <= ymax; y++ ) {
 907                                 vik_viewport_draw_line ( vvp, black_gc, 0, yy, width, yy );
 908                                 yy += vml->tile_size_x; // Yes use X ATM
 909                         }
 910                 }
 911         }
 912 }
 913
 914 /**
 915  *
 916  */
 917 static void mapnik_layer_free ( VikMapnikLayer *vml )
 918 {
 919         mapnik_interface_free ( vml->mi );
 920         if ( vml->filename_css )
 921                 g_free ( vml->filename_css );
 922         if ( vml->filename_xml )
 923                 g_free ( vml->filename_xml );
 924 }
 925
 926 static VikMapnikLayer *mapnik_layer_create ( VikViewport *vp )
 927 {
 928         return mapnik_layer_new ( vp );
 929 }
 930
 931 typedef enum {
 932         MA_VML = 0,
 933         MA_VVP,
 934         MA_LAST
 935 } menu_array_index;
 936
 937 typedef gpointer menu_array_values[MA_LAST];
 938
 939 /**
 940  *
 941  */
 942 static void mapnik_layer_flush_memory ( menu_array_values values )
 943 {
 944         a_mapcache_flush_type ( MAP_ID_MAPNIK_RENDER );
 945 }
 946
 947 /**
 948  *
 949  */
 950 static void mapnik_layer_reload ( menu_array_values values )
 951 {
 952         VikMapnikLayer *vml = values[MA_VML];
 953         VikViewport *vvp = values[MA_VVP];
 954         mapnik_layer_post_read (VIK_LAYER(vml), vvp, FALSE);
 955         mapnik_layer_draw ( vml, vvp );
 956 }
 957
 958 /**
 959  * Force carto run
 960  *
 961  * Most carto projects will consist of many files
 962  * ATM don't have a way of detecting when any of the included files have changed
 963  * Thus allow a manual method to force re-running carto
 964  */
 965 static void mapnik_layer_carto ( menu_array_values values )
 966 {
 967         VikMapnikLayer *vml = values[MA_VML];
 968         VikViewport *vvp = values[MA_VVP];
 969
 970         // Don't load the XML config if carto load fails
 971         if ( !carto_load ( vml, vvp ) )
 972                 return;
 973
 974         gchar* ans = mapnik_interface_load_map_file ( vml->mi, vml->filename_xml, vml->tile_size_x, vml->tile_size_x );
 975         if ( ans ) {
 976                 a_dialog_error_msg_extra ( VIK_GTK_WINDOW_FROM_WIDGET(vvp),
 977                                            _("Mapnik error loading configuration file:\n%s"),
 978                                            ans );
 979                 g_free ( ans );
 980         }
 981         else
 982                 mapnik_layer_draw ( vml, vvp );
 983 }
 984
 985 /**
 986  * Show Mapnik configuration parameters
 987  */
 988 static void mapnik_layer_information ( menu_array_values values )
 989 {
 990         VikMapnikLayer *vml = values[MA_VML];
 991         if ( !vml->mi )
 992                 return;
 993         GArray *array = mapnik_interface_get_parameters( vml->mi );
 994         if ( array->len ) {
 995                 a_dialog_list (  VIK_GTK_WINDOW_FROM_LAYER(vml), _("Mapnik Information"), array, 1 );
 996                 // Free the copied strings
 997                 for ( int i = 0; i < array->len; i++ )
 998                         g_free ( g_array_index(array,gchar*,i) );
 999         }
1000         g_array_free ( array, FALSE );
1001 }
1002
1003 /**
1004  *
1005  */
1006 static void mapnik_layer_about ( menu_array_values values )
1007 {
1008         VikMapnikLayer *vml = values[MA_VML];
1009         gchar *msg = mapnik_interface_about();
1010         a_dialog_info_msg ( VIK_GTK_WINDOW_FROM_LAYER(vml),  msg );
1011         g_free ( msg );
1012 }
1013
1014 /**
1015  *
1016  */
1017 static void mapnik_layer_add_menu_items ( VikMapnikLayer *vml, GtkMenu *menu, gpointer vlp )
1018 {
1019         static menu_array_values values;
1020         values[MA_VML] = vml;
1021         values[MA_VVP] = vik_layers_panel_get_viewport( VIK_LAYERS_PANEL(vlp) );
1022
1023         GtkWidget *item = gtk_menu_item_new();
1024         gtk_menu_shell_append ( GTK_MENU_SHELL(menu), item );
1025         gtk_widget_show ( item );
1026
1027         // Typical users shouldn't need to use this functionality - so debug only ATM
1028         if ( vik_debug ) {
1029                 item = gtk_image_menu_item_new_with_mnemonic ( _("_Flush Memory Cache") );
1030                 gtk_image_menu_item_set_image ( (GtkImageMenuItem*)item, gtk_image_new_from_stock (GTK_STOCK_REMOVE, GTK_ICON_SIZE_MENU) );
1031                 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_flush_memory), values );
1032                 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
1033                 gtk_widget_show ( item );
1034         }
1035
1036         item = gtk_image_menu_item_new_from_stock ( GTK_STOCK_REFRESH, NULL );
1037         g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_reload), values );
1038         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
1039         gtk_widget_show ( item );
1040
1041         if ( g_strcmp0 ("", vml->filename_css) ) {
1042                 item = gtk_image_menu_item_new_with_mnemonic ( _("_Run Carto Command") );
1043                 gtk_image_menu_item_set_image ( (GtkImageMenuItem*)item, gtk_image_new_from_stock (GTK_STOCK_EXECUTE, GTK_ICON_SIZE_MENU) );
1044                 g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_carto), values );
1045                 gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
1046                 gtk_widget_show ( item );
1047         }
1048
1049         item = gtk_image_menu_item_new_from_stock ( GTK_STOCK_INFO, NULL );
1050         g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_information), values );
1051         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
1052         gtk_widget_show ( item );
1053
1054         item = gtk_image_menu_item_new_from_stock ( GTK_STOCK_ABOUT, NULL );
1055         g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_about), values );
1056         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
1057         gtk_widget_show ( item );
1058 }
1059
1060 /**
1061  * Rerender a specific tile
1062  */
1063 static void mapnik_layer_rerender ( VikMapnikLayer *vml )
1064 {
1065         MapCoord ulm;
1066         // Requested position to map coord
1067         map_utils_vikcoord_to_iTMS ( &vml->rerender_ul, vml->rerender_zoom, vml->rerender_zoom, &ulm );
1068         // Reconvert back - thus getting the coordinate at the tile *ul corner*
1069         map_utils_iTMS_to_vikcoord (&ulm, &vml->rerender_ul );
1070         // Bottom right bound is simply +1 in TMS coords
1071         MapCoord brm = ulm;
1072         brm.x = brm.x+1;
1073         brm.y = brm.y+1;
1074         map_utils_iTMS_to_vikcoord (&brm, &vml->rerender_br );
1075         thread_add (vml, &ulm, &vml->rerender_ul, &vml->rerender_br, ulm.x, ulm.y, ulm.z, ulm.scale, vml->filename_xml );
1076 }
1077
1078 /**
1079  * Info
1080  */
1081 static void mapnik_layer_tile_info ( VikMapnikLayer *vml )
1082 {
1083         MapCoord ulm;
1084         // Requested position to map coord
1085         map_utils_vikcoord_to_iTMS ( &vml->rerender_ul, vml->rerender_zoom, vml->rerender_zoom, &ulm );
1086
1087         mapcache_extra_t extra = a_mapcache_get_extra ( ulm.x, ulm.y, ulm.z, MAP_ID_MAPNIK_RENDER, ulm.scale, vml->alpha, 0.0, 0.0, vml->filename_xml );
1088
1089         gchar *filename = get_filename ( vml->file_cache_dir, ulm.x, ulm.y, ulm.scale );
1090         gchar *filemsg = NULL;
1091         gchar *timemsg = NULL;
1092
1093         if ( g_file_test ( filename, G_FILE_TEST_EXISTS ) ) {
1094                 filemsg = g_strconcat ( "Tile File: ", filename, NULL );
1095                 // Get some timestamp information of the tile
1096                 GStatBuf stat_buf;
1097                 if ( g_stat ( filename, &stat_buf ) == 0 ) {
1098                         gchar time_buf[64];
1099                         strftime ( time_buf, sizeof(time_buf), "%c", gmtime((const time_t *)&stat_buf.st_mtime) );
1100                         timemsg = g_strdup_printf ( _("Tile File Timestamp: %s"), time_buf );
1101                 }
1102                 else {
1103                         timemsg = g_strdup ( _("Tile File Timestamp: Not Available") );
1104                 }
1105         }
1106         else {
1107                 filemsg = g_strdup_printf ( "Tile File: %s [Not Available]", filename );
1108                 timemsg = g_strdup("");
1109         }
1110
1111         GArray *array = g_array_new (FALSE, TRUE, sizeof(gchar*));
1112         g_array_append_val ( array, filemsg );
1113         g_array_append_val ( array, timemsg );
1114
1115         gchar *rendmsg = NULL;
1116         // Show the info
1117         if ( extra.duration > 0.0 ) {
1118                 rendmsg = g_strdup_printf ( _("Rendering time %.2f seconds"), extra.duration );
1119                 g_array_append_val ( array, rendmsg );
1120         }
1121
1122         a_dialog_list (  VIK_GTK_WINDOW_FROM_LAYER(vml), _("Tile Information"), array, 5 );
1123         g_array_free ( array, FALSE );
1124
1125         g_free ( rendmsg );
1126         g_free ( timemsg );
1127         g_free ( filemsg );
1128         g_free ( filename );
1129 }
1130
1131 static gboolean mapnik_feature_release ( VikMapnikLayer *vml, GdkEventButton *event, VikViewport *vvp )
1132 {
1133         if ( !vml )
1134                 return FALSE;
1135         if ( event->button == 3 ) {
1136                 vik_viewport_screen_to_coord ( vvp, MAX(0, event->x), MAX(0, event->y), &vml->rerender_ul );
1137                 vml->rerender_zoom = vik_viewport_get_zoom ( vvp );
1138
1139                 if ( ! vml->right_click_menu ) {
1140                         GtkWidget *item;
1141                         vml->right_click_menu = gtk_menu_new ();
1142
1143                         item = gtk_image_menu_item_new_with_mnemonic ( _("_Rerender Tile") );
1144                         gtk_image_menu_item_set_image ( (GtkImageMenuItem*)item, gtk_image_new_from_stock (GTK_STOCK_REFRESH, GTK_ICON_SIZE_MENU) );
1145                         g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_rerender), vml );
1146                         gtk_menu_shell_append ( GTK_MENU_SHELL(vml->right_click_menu), item );
1147
1148                         item = gtk_image_menu_item_new_with_mnemonic ( _("_Info") );
1149                         gtk_image_menu_item_set_image ( (GtkImageMenuItem*)item, gtk_image_new_from_stock (GTK_STOCK_INFO, GTK_ICON_SIZE_MENU) );
1150                         g_signal_connect_swapped ( G_OBJECT(item), "activate", G_CALLBACK(mapnik_layer_tile_info), vml );
1151                         gtk_menu_shell_append ( GTK_MENU_SHELL(vml->right_click_menu), item );
1152                 }
1153
1154                 gtk_menu_popup ( GTK_MENU(vml->right_click_menu), NULL, NULL, NULL, NULL, event->button, event->time );
1155                 gtk_widget_show_all ( GTK_WIDGET(vml->right_click_menu) );
1156         }
1157
1158         return FALSE;
1159 }